Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design

Journal article
(Original article)


Publication Details

Author(s): Hutzler A, Schmutzler T, Jank MPM, Branscheid R, Unruh T, Spiecker E, Frey L
Journal: Nano Letters
Publication year: 2018
Volume: 18
Journal issue: 11
Pages range: 7222 - 7229
ISSN: 1530-6984
Language: English


Abstract

The growth of silver shells on gold nanorods is investigated by in situ
liquid cell transmission electron microscopy using an advanced liquid
cell architecture. The design is based on microwells in which the liquid
is confined between a thin Si3N4 membrane on one
side and a few-layer graphene cap on the other side. A well-defined
specimen thickness and an ultraflat cell top allow for the application
of high-resolution TEM and the application of analytical TEM techniques
on the same sample. The combination of high-resolution data with
chemical information is validated by radically new insights into the
growth of silver shells on cetrimonium bromide stabilized gold nanorods.
It is shown that silver bromide particles already formed in the stock
solution play an important role in the exchange of silver ions. The Ag
shell growth can be directly correlated with the layer-by-layer
dissolution of AgBr nanocrystals, which can be controlled by the
electron flux density via distinctly generated chemical species in the
solvent. The derived model framework is confirmed by in situ UV–vis
absorption spectroscopy evaluating the blue shift in the longitudinal
surface plasmon resonance of anisotropic NRs in a complementary batch
experiment.


FAU Authors / FAU Editors

Branscheid, Robert
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Frey, Lothar Prof. Dr.
Lehrstuhl für Elektronische Bauelemente
Hutzler, Andreas Dr.-Ing.
Lehrstuhl für Elektronische Bauelemente
Schmutzler, Tilo
Professur für Nanomaterialcharakterisierung (Streumethoden)
Spiecker, Erdmann Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Mikro- und Nanostrukturforschung)
Unruh, Tobias Prof. Dr.
Professur für Nanomaterialcharakterisierung (Streumethoden)


Additional Organisation
Graduiertenkolleg 1896/2 In situ Mikroskopie mit Elektronen, Röntgenstrahlen und Rastersonden
Interdisziplinäres Zentrum, Center for Nanoanalysis and Electron Microscopy (CENEM)


External institutions with authors

Fraunhofer-Institut für Integrierte Systeme und Bauelementetechnologie (IISB)


How to cite

APA:
Hutzler, A., Schmutzler, T., Jank, M.P.M., Branscheid, R., Unruh, T., Spiecker, E., & Frey, L. (2018). Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design. Nano Letters, 18(11), 7222 - 7229. https://dx.doi.org/10.1021/acs.nanolett.8b03388

MLA:
Hutzler, Andreas, et al. "Unravelling the Mechanisms of Gold−Silver Core−Shell Nanostructure Formation by in Situ TEM Using an Advanced Liquid Cell Design." Nano Letters 18.11 (2018): 7222 - 7229.

BibTeX: 

Last updated on 2019-18-07 at 14:41